REFUSE SORTING DEVICE FOR REFUSE STORAGE ROOMS

Abstract: The invention concerns a device in refuse storage rooms for sorting refuse discharged from a refuse chute. An open-top container (1) is provided with an openable bottom element (17) and in a basic position it is located straight underneath a refuse chute. After having collected refuse discharged from the chute the container is arranged to be moved to a position above a selected one of a number of dust bins (A, B, K). A first indicating means (19) is arranged to detect refuse falling into the container (1). A second indicating means (12, 13, 14, 15, 16) is arranged to detect the arrival of said container (1) to the position above the selected one of said dust bins (A, B, K) and there to indicate opening of the bottom of the container (1) to allow discharge of the refuse into said bin (A, B, K).

Description: REFUSE SORTING DEVICE FOR REFUSE STORAGE ROOMS The subject invention concerns a refuse sorting device to separate refuse and waste being discharged from a refuse chute. For environmental reasons it has become increasingly urgent in latter years to separate refuse into various categories in order to facilitate the refuse handling, e.g. for recirculation and reclamation. In multistorey buildings equipped with a refuse chute that passes through all the building floors it has been the practice for several years to use, instead of one single dust bin positioned at the refuse chute mouth in the refuse storage room, a device known as a dust bin shifter or "carousel". The latter device comprises a number of bin bag holders that are arranged to be displaced about a common centre. As the dust bin shifter is rotated one dust bin holder at a time is turned into position underneath the refuse chute mouth for exchange of a filled bag for an empty one. When a dust bin shifter of this kind is used for category-collection of refuse it has been found to entail not negligible drawbacks. For instance, when a person on one floor of the building wants to throw category-sorted refuse intended for a particular bin bag in the refuse storage room down the chute he has to press a button on a keyboard beside the refuse-chute door and wait for the go- ahead signal which will only be emitted when the dust bin shifter has turned to the position wherein the selected bag is presented underneath the chute mouth. More often than not, the necessity to have to wait for the go-ahead signal before throwing the refuse down the chute is felt as irritating. One consequence often is a diminishing interest for strict category-sorting of refuse. The subject invention provides a simple and practical device which highly facilitates category-sorting of refuse and which is extremely reliable. The characterizing features of the device are defined in the appended claims. The invention will be described in closer detail in the following with reference to the accompanying drawings, wherein Fig. 1 is a perspective view of the refuse sorting device in accordance with the invention, Figs. 2 and 3 are side views of a container incorpo¬ rated in the device, in respectively closed and open position, and Fig. 4 is a view from above of the device in position above some dust bins. The principal component of the device is a container 1 which in accordance with the embodiment to be described in the following is attached to the outer end of a horizontal arm 2. The latter is mounted at the upper end of a movable member 3 of a pillar which by means of a stationary pillar member 4 is permanently secured to a support by means of a floor fitting 5. At its upper end the pillar 3, 4 is fitted with a wall attachment 6. The latter supports an electric motor 7. A drive mechanism, which may consist of a chain drive 8, a chain 9 and a sprocket wheel 10 which is securely attached to the movable member 3 of the pillar, is programme-controlled to turn the arm 2 and the container 1 into a position above the selected one of a number of dust bins A, B and K (see Fig. 4). Position transducers 12, 13, 14, 15 and 16 are arranged on the movable member 3 of the pillar and a on a bracket 11 externally thereof in order to bring about these controlled arm turning movements. The container 1 is an open-top container and at its bottom it is provided with a bottom disc 17, the position of which may be shifted by means of a positioning means 18. The arm 2 preferably is telescopically prolongable for adjustment of the position of the container 1 above a dust bin A, B, K. At its upper rim the container 1 is fitted with an indicating means 19 in the form of a two-prong feeler for detection of refuse being discharged into the container 1. The basic position of the container 1 always is straight underneath a chute mouth. However, the number of dust bins A, B, K may be varied as may also the extent of refuse sorting. In accordance with the embodiment illustrated in Fig. 4 it is assumed that the dust bin A is intended for unsorted refuse, dust bin B for combustible material and dust bin K for composting material. In accordance with this embodiment, the container 1 is positioned above dust bin A with its bottom element in the open swung-away position, as appears from Fig. 3. When a person wishes to get rid of unsorted refuse he thus need only open the refuse-chute door on his floor and throw the refuse down the chute. The refuse then passes from the chute straight down, through the container 1 and into the dust bin A. When on the other hand he wishes to get rid of sorted, combustible material, he first presses a button marked B on a keyboard at the side of the chute door and then he may throw the refuse down the chute straight away. As he presses the button a signal is emitted to the positioning means 18 which immediately resets the bottom plate 17 to its closing position underneath the container 1. As the refuse is falling down into the container it passes the feeler 19 resulting in an indication signal to start the arm swinging operation. The arm 2 then swings the container 1 to a position above dust bin B. The position transducers 13, 15 verify that the correct position is obtained and in addition emit a signal to the positioning means 18 to displace the container bottom to the open position. The container 1 is then returned to its position above dust bin A. During this return movement the bottom of the container 1 is in the open position. In case the refuse being thrown down the chute into the container 1 fails to activate the feeler 19 upon its passage the container 1 will nonetheless start to shift its position after a certain delay, say 15 to 20 sec. in accordance with a preset programme. In accordance with an alternative embodiment the com¬ posting bin K is the one positioned underneath the con¬ tainer when the latter assumes its basic position. In this case the bottom of the container 1 is closed but opens as a button K on the keyboard next to the refuse-chute door on any floor is pressed. Composting refuse passes the feeler member 19 without in this case activating the latter to give an impulse for initiating shifting of the container position. Instead, an indication is again given to close the bottom of the container 1. Should unsorted refuse be thrown down the refuse chute without any button being pressed beforehand the feeler 19 will detect the passage of the refuse and give an impulse to shift the container 1 to the position above dust bin A which in this case is assumed to have changed position with bin K in Fig. 4. The position transducers 14, 16 indicate stop and opening of the bottom of the container 1. In response to the programme control, the bottom member 17 is moved to its container-bottom closing position as the container is returning to its basic position. In accordance with the embodiment illustrated in the drawing figures the disc-like bottom element 17 of the container 1 is fitted with a scraper 20. Upon swinging movement of the container 1, as appears from Fig. 4, when the container is displaced across a dust bin A, B or K, the scraper 20 functions to exert a scraping action on any projecting heaps of refuse in any one bin for the purpose of spreading and levelling the refuse inside the bin to improve the loading capactiy of the latter. The device preferably also includes photoelectric cell equipment 21, 22, by means of which it becomes possible to sense when a dust bin A, B or K is filled. When a bin is filled, this condition may be indicated for instance by means of the lightening-up of a lamp outside the refuse storage room and/or a signal being emitted to the caretaker's office. Preferably, the entrance of personnel into the refuse storage room, e.g. to collect filled dust bins, is detected, for instance by means of IR-operated means. Upon detection of such presence a signal is given to the positioning means 18 to pivot the bottom disc 17 to the closed position (when the container 1 is open in its basic position), and a corresponding indication signal is emitted at each chute door and in the caretaker's office (lit-up lamp). The primary advantage of the device in accordance with the invention is that it is extremely convenient to use. A person who intends to dispose of garbage by throw¬ ing it down a refuse chute never has to wait by the chute door for the go-ahead signal. Instead, he can either throw the garbage straight down the chute or else first press a button and then immediately thereafter throw the garbage down the chute. The refuse either falls straight from the chute mouth, through the container 1 and into a dust bin or else the refuse is caught in the container 1 and is transported therein to one of the other dust bins. This transport takes place after the person has moved away from the chute door. The considerable movability of the container 1 makes the handling system very flexible. There is no restriction to a certain type or size of dust bin that may be used. The bins could for instance be a few large-size stationary vessels as illustrated in the drawings, or else consist of a long row of bag holders in which bin bags of paper or plastics material are mounted. The invention is not either limited to the embodiment described in the aforegoing and illustrated in the draw¬ ings but may be varied in many ways within the scope of the appended claims. The bins A, B and K could be placed in a row, one after the other, and the arm 2 be a tele¬ scopic arm the extension and retraction motions of which are programme-controlled to shift the container into position above the appropriate one of bins A, B, K. In accordance with another embodiment the container 1 may be mounted on a rail suspended from the refuse storage room ceiling or mounted on one of the room walls to serve as a support and guide rail for shifting the container 1 from one bin to the other. The container 1 could also be displaceable on leg-supported rails.

Claims: CLAIMS 1. A device in refuse storage rooms for sorting refuse discharged from a refuse chute, c h a r a c ¬ t e r i z e d by an open-top container (1) which is fitted with an openable bottom element (17) and which assumes a basic position straight underneath a refuse chute, said container (1) arranged, after having collected refuse discharged from the chute, to be moved to a position above a selected one of a number of dust bins (A, B, K), and by a first indicating means (19) which is arranged to detect refuse falling into the container (1) and a second indicating means (12, 13, 14, 15, 16) which is arranged to detect the arrival of said container (1) to the position above the selected one of said dust bins (A, B, K) and there to indicate opening of the bottom of the 1 container (1) to allow discharge of the refuse into said bin (A, B, K). 2. A device as claimed in claim 1, c h a r a c ¬ t e r i z e d in that the first indicating means (19) is arranged, following detection of refuse falling into the container (1), to indicate start of the displacement of the container (1). 3. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d in that the first indicating means (19) is arranged, following detection of refuse falling into the container (1), to indicate closing of the bottom of the container (1). 4. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d in that the bottom of the container (1) consists of a disc (17), positioning means (18) being provided to impart a swinging movement to said disc (17). 5. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d in that the container (1) is provided with a scraper means (20) which projects downwardly from the container bottom disc (17) and which is arranged, upon movement of the container (1) across a dust bin (A, B, K) to effect a scraping action on any projecting heaps of refuse formed in the associated dust bin (A, B, K) in order to level and to spread the refuse inside the bin (A, B, K). 6. A device as claimed in any one of the preceding claims, c h a r a c t e r i z e d in that the container (1) is mounted on a horizontal arm (2), said arm arranged to be swung into different set positions above a number of dust bins (A, B, K). 7. A device as claimed in any one of claims 1 - 5, c h a r a c t e r i z e d in that the container (1) is mounted on a horizontal arm, said arm arranged to displace said container (1) from one set position to another by its telescopic extension or retraction. 8. A device as claimed in any one of claims 1 - 5, c h a r a c t e r i z e d in that the container (1) is arranged to be displaced along at least one horizontal rail from one set position to another above the dust bins (A, B, K).

Inventors: SMEDLUND LARS, SMEDLUND, LARS
Applicants: SMEDLUND LARS, SMEDLUND MILJOESYSTEM AB, SMEDLUND, LARS
Application year: 1994
Main classification: B07C9
IPC codes: B03B9, B07B13, B65F1